3 files changed, 47 insertions, 1 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index e96adcbcab41..b2022885ced8 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -18,6 +18,7 @@ config ALPHA
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select AUDIT_ARCH
 	select GENERIC_CLOCKEVENTS
+	select GENERIC_CPU_VULNERABILITIES
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index bf7b41fa7b01..5a74581bf0ee 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -9,7 +9,7 @@ ccflags-y	:= -Wno-sign-compare
 
 obj-y    := entry.o traps.o process.o osf_sys.o irq.o \
 	    irq_alpha.o signal.o setup.o ptrace.o time.o \
-	    systbls.o err_common.o io.o
+	    systbls.o err_common.o io.o bugs.o
 
 obj-$(CONFIG_VGA_HOSE)	+= console.o
 obj-$(CONFIG_SMP)	+= smp.o
diff --git a/arch/alpha/kernel/bugs.c b/arch/alpha/kernel/bugs.c
new file mode 100644
index 000000000000..08cc10d7fa17
--- /dev/null
+++ b/arch/alpha/kernel/bugs.c
@@ -0,0 +1,45 @@
+
+#include <asm/hwrpb.h>
+#include <linux/device.h>
+
+
+#ifdef CONFIG_SYSFS
+
+static int cpu_is_ev6_or_later(void)
+{
+	struct percpu_struct *cpu;
+        unsigned long cputype;
+
+        cpu = (struct percpu_struct *)((char *)hwrpb + hwrpb->processor_offset);
+        cputype = cpu->type & 0xffffffff;
+        /* Include all of EV6, EV67, EV68, EV7, EV79 and EV69. */
+        return (cputype == EV6_CPU) || ((cputype >= EV67_CPU) && (cputype <= EV69_CPU));
+}
+
+ssize_t cpu_show_meltdown(struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	if (cpu_is_ev6_or_later())
+		return sprintf(buf, "Vulnerable\n");
+	else
+		return sprintf(buf, "Not affected\n");
+}
+
+ssize_t cpu_show_spectre_v1(struct device *dev,
+                            struct device_attribute *attr, char *buf)
+{
+	if (cpu_is_ev6_or_later())
+		return sprintf(buf, "Vulnerable\n");
+	else
+		return sprintf(buf, "Not affected\n");
+}
+
+ssize_t cpu_show_spectre_v2(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	if (cpu_is_ev6_or_later())
+		return sprintf(buf, "Vulnerable\n");
+	else
+		return sprintf(buf, "Not affected\n");
+}
+#endif